java统计一个文件(d:\a.txt)中出现过多少单词,以a开头的单词有多少个?

以下是Java代码实现：

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class WordCount {
    public static void main(String[] args) {
        String filePath = "d:/a.txt";
        int totalWordCount = 0;
        int aWordCount = 0;

        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
            String line;
            while ((line = br.readLine()) != null) {
                String[] words = line.split("\\s+");
                for (String word : words) {
                    totalWordCount++;
                    if (word.startsWith("a") || word.startsWith("A")) {
                        aWordCount++;
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        System.out.println("Total word count: " + totalWordCount);
        System.out.println("Word count starting with 'a': " + aWordCount);
    }
}

该程序首先读取指定文件中的每一行，然后使用空格作为分隔符将每行拆分成单词数组。接着遍历每个单词，分别统计总单词数和以'a'或'A'开头的单词数。最后输出结果。